Tool for applying metal fittings for bolts, &amp;c.



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y UNITED STATESr Patented une 23, 190:3.

PATENT OFFICE.

4TOOL-FOR APPLYING METAL FITTINGS FOR BOLTS, 8C.

SPECIFICATION forming part of Letters Patent N0. 731,719, dated June 23, 1903.

application tied october 6,1902.`

To @ZZ whom t may concern: l

Be it known that I, JEAN VINCENT EMMAN- public, and a resident of Paris, France, have invented a Tool for Fitting Tapped Metal Sockets into Wood, of which the following is The present invention relates to tools for applying or fixing metal fittings on the Thiollier system for bolts, screws, cramp-irons, and the like.

`It may be stated that a fitting for bolts, screws, and the like on the Thiollier system, which is described in the specification of English Letters Patent No. 9,902, dated May 13, 1901, consists of a helix or spiral of steel,usu ally ofl oval or round cross-section, having the same pitch as the bolt or screw. This helix or spiral is adapted to be screwed into a suitable hole cut in a beam or other wooden member by means of a tap. Itis inserted by means of a tool or inserting-key. It is these tools which form the subject-matter of the present invention.

In the accompanying drawings,cFigure 1 is an elevation of a screwing-key constructed according to my invention. Fig. 2 shows the said screwing-key, together with the tting, ready for insertion into its socket. Fig. Sis an end view of the screwing-key shown in Fig. 2 in engagement with the fitting.

. The first operation requisite for inserting the Thiollier fitting is the boring or drilling, according to the circumstances of the case, of a preparatory hole inthe cross-beam to which the fitting is to be fixed by means of an American auger, so as to give a perfect Serial No. 126,125. (No model.)

bore to the new or old hole. The hole is then tapped for the purpose of cutting the helical groove which is designed to :receive the fitting. After the helical groove has been cut the Thiollier fitting is inserted therein by means of the screwing-key shown. This tool consists of a steel stern e, screw-threaded to the same pitch as that of the fitting which it is desired to fix in position. In the lower part of said stem there is formed a notch f, forming an acute angle, which is designed to bite or engage with the last spiral g of the fitting h for the purpose of taking the latter around with it, in the descending motion which is imparted to the screwing-key by giving it the same movement as for a screw. The head of the screwing-key may be, like the tap, of varying form.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a tool for inserting a spiral fitting, a shank provided with a groove adapted to engage said fitting and means for engaging said fitting whereby it will be turned with said shank.

, 2. In a tool for inserting screw-threaded metal fittings into tapped holes, a stern carrying a thread of same pitch and shape, and diameter as internal diameter of socket to be inserted; a notch fat lower end of said stem.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

JEAN VINCENT EMMANUEL THIOLLIER.

Witnesses:

ADOLPHE STURM, EDWARD P. MAOLEAN. 

